Deuteronomy 28:53-55

53And you shall eat the fruit of your womb, the flesh of your sons and daughters, whom the Lord your God has given you, in the siege and in the distress with which your enemies shall distress you.

54The man who is the most tender and refined among you will begrudge food to his brother, to the wife he embraces, and to the last of the children whom he has left,

55so that he will not give to any of them any of the flesh of his children whom he is eating, because he has nothing else left, in the siege and in the distress with which your enemy shall distress you in all your towns.